<template>
  <div>
    <div class="search">
      <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音">
    </div>
    <div
      class="search-content" 
      ref="search"
      v-show="keyword"
    >
      <ul>
        <li
          class="search-item border-bottom" 
          v-for="item of list" :key="item.id"
          @click="handleCityClike(item.name)"
        >
         {{item.name}}
         </li>
        <li
          class="search-item border-bottom" 
          v-show="hasNoData"
        >
          没有找到匹配数据
        </li>
      </ul>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import {mapMutations} from 'vuex'
export default {
  name: 'CitySearch',
  props: {
    cities: Object
  },
  data() {
    return {
      keyword: '',
      list: [],
      timer: null
    }
  },
  computed: {
    hasNoData() {
      return !this.list.length
    }
  },
  methods: {
    handleCityClike(city) {
      this.changeCity(city);
      this.$router.push("/");
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    keyword() {
      if(this.timer){
        clearTimeout(this.timer)
      }
      if(!this.keyword) {
        this.list = []
        return 
      }
      this.timer = setTimeout( () => {
        const result = []
        for(let i in this.cities) {
          this.cities[i].forEach( (value) => {
            if(value.spell.indexOf(this.keyword) > -1 ||
                value.name.indexOf(this.keyword) > -1){
                  result.push(value)
                }
          })
        }
        this.list = result
      }, 100)
    }
  },
  mounted() {
    this.scroll = new Bscroll(this.$refs.search);
  }
}
</script>

<style lang="stylus" scoped>
@import '~styles/variables.styl'
.search
  height: .72rem
  padding: 0 .2rem
  background: $bgColor
  .search-input
    box-sizing: border-box
    width: 100%
    height: .62rem
    padding: 0 .1rem
    line-height: .62rem
    text-align: center
    border-radius: .06rem
    color: #666
    touch-action: none;
.search-content
  z-index:1
  overflow: hidden
  position: absolute
  top: 1.58rem
  left: 0
  right: 0
  bottom: 0
  background: #eeeeee
  .search-item
    line-height: .62rem
    padding-left: .2rem
    background: #fff
    color: #666
</style>